Limekiln-door.



PATBNTED NOV. 24, 1903,

s. W. SH-OOP. LIMEKILN DOOR.

APPLICATION FILED SEPT. 10. 1903.

N0 MODEL.

UNITED STATES Patented November 24, 1903.

SAUL W. SHOOP, OF FRONT ROYAL, VIRGINIA.

LIMEKILNS-DOOR.

SPECIFICATION forming part of Letters Patent No. 745,249, dated November 24, 1903.

Application filed September 10,1903. SerialNo. 172,600. (No model.)

T0 on whom it may concern:

Be it known that I, SAUL W. SHOOP, a citizen of the United States, residing at Front Royal, in the county of Warren and State of Virginia, have invented certain new and useful Improvements in Limekiln-Doors, of which the following is a specification.

One of the difflculties experienced in the operation of limekilns of the usual construction is the warping and twisting out of shape of the furnace-door, caused by the intense heat required in the operation, which prevents the proper control of the draft and interferes with securing perfect results and necessitates the frequent substitution of new doors, with the consequent expense.

The object of my said invention is therefore to provide a door for the furnace of a limekiln which will be of a construction capable of withstanding the intense heat and maintaining its perfect form for along time, thereby increasing theefficienoy of the limekiln and saving the expense'of frequently supplying new doors for the furnace, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a perspective View of. a small section of a limekiln, showing a furnace-door of my improved construction in position thereon; Fig. 2, a view slightly in perspective of the outside of said door separate; Fig. 3, an inside plan view of said door, and Fig. 4 a central vertical section through the same.

Said door consists of a plate A, of cast metal, of ordinary form, provided with half-hinges aand a latch a, as is usual. Onitsinside at a distance from its several edges which is just,

within the mouth of the furnace it is provided with a wide horizontal flange a which in effect forms a box on the inside of said door.

Within said box is contained a lining A, of

fire-brick or similar heat-resisting material, completely protecting the inside surface of said door. Said lining is of a considerable thickness, as best shown in Fig. 4, and is wholly supported and'carried within the flange a On the outside of the door, as best shown in Figs. 1, 2, and 4, is formed an upper flange a a lower flange a and several vertical flanges a extending between and connecting said upper and lower flanges. Said lower flange 0. is preferably somewhat wider than the top flange a and said vertical flanges are of a corresponding width at. the top and bottom, being tapered at their outer edges, as shown in Fig. 4. By this means the door is protected from the heat on the inside and so braced on its outside as to be of a sufficient stiffness to resist the strain or any tendency to warp and will thus maintain its perfect shape for a very long time. Limekilns provided with such doors operate more satisfactorily and with less cost because of the fact that the draft may be more perfectly regulated and new doors are not so frequently required.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is'

1. A limekiln-door comprising a cast-metal plate having a box-like flange onits inner surface, a' lining of heat-resisting material mounted within said box like flange and. brace-flanges on its outer surface, substantially as set forth.

2. A limekiln-door comprising a cast-metal plate having a box-like flange cast upon its inner surface, heat-resisting material mounted in said box-like flange, upper and lower flanges extending across the outer surface of the said door and vertical flanges connecting said upper and lower flanges, substantially as set forth.

3. A limekiln-door comprising a cast-metal plate, a horizontal flange formed on its inner surface around its four sides, a fire-brick lining within said flange, and vertical and horizontal flanges cast upon the outer surfaceof said door to serve as braces therefor, substantially as set forth.

4. A door for limekilns formed with a flange surrounding the surface on its inner. face which is exposed to the action of the fire, heat-resisting material mounted within said flange, and brace-flanges on its outer surface, substantially as set forth. 1

In Witness whereof I have hereunto set my hand and seal, at Washington, District of Columbia, this 24th day of August, A. D. 1903.

Witnesses:

E. W. BRADFORD, KATIE Huns'r. 

